Tinker,
Your concerns are appreciated, and I like to see words of caution surrounding very-high nic juices. Nicotine is dangerous, but it is legal, and not a controlled substance as yet. The bottles of nic-juice are generally labeled making it clear it is a poison and hazmat. I seriously doubt that if you managed to damage yourself with nicotine you would stand a chance of winning a lawsuit against everyone you mention. Everyone knows nic is dangerous, and as long as it is legal telling people where to get it is also legal, and so is selling it.
Pharm grade nic is not much more expensive than pesticide grade nic, but pharm grade produces a clear colorless solution, which BTW is not aqueous, it is in PG or VG, although some water may be added to thin it a bit. Pest grade tends to be yellow to orange, but pharm grade when exposed to air over time will also yellow. Best to buy juice that is clear and colorless, such as MFS or Levy's, both of which have been tested by our resident chemists and contain the nic level as advertised.
Vendors, especially US juice makers part of this forum, have no interest in ripping people off. False claims of nic content that are discovered lead to no one buying from that vendor. Good nic is not that expensive. Vendors like customers.
That all said, I agree with Levy, those new to DIY should stick with lower nic levels until they have more experience. Working with VG juice is not like working with water, and messes are inevitable until you know what you are doing. I recommend using syringes for pretty much everything, as I spelled out in the storage thread.
And stay away from pure free-base nic. I'm a long term chemist and I will not touch the stuff. It is wickedly dangerous, for sure. 100 mg juice is also extremely dangerous, but the PG or VG does slow up skin absorption to a degree. That said, you get 0.5 mL on you and best wash it off fast, and you will still likely feel sick from it. Spill a bunch on the carpet, and you have a hazmat situation that will have to be taken care of professionally. Spill a bunch on you with significant skin coverage and you will either die or wish you did. Horrible way to go.
But in the few years that ecigs and ejuice have been around here, there has not been one serious injury or death. So even though nic juice can be certainly dangerous, nic + knowledge + safety measures seems to be statistically "safer" than driving a car. And I'm sure the FDA and the media is desperately looking for some nic-related death or hospitalization. Trust me, if there was one we would know, and so would everyone else.
NRTs, especially the patch, however, are responsible for many nic-related hospitalizations every year from nic poisoning. No problem with them being available. Chantix is responsible for suicide ideation and actual suicides. No problem there either, although it is script only. Swallow a bunch of lozenges or gum pieces and you can kill yourself. No problem with availability there either. All, but chantix, are over the counter.
So its ok to buy 60 mg, but not higher? Well, that's the UK, which is rapidly becoming more of a nanny state than the US. I don't know why 60 mg is much less of a hazard than 100 mg. Both are going to injure if misused, and both are going to totally screw up a house if a lot is spilled.
I can't change laws, and I hate it when laws deny me my right to be a responsible adult. You will possibly get your wish, and then some, as it is likely nic levels will be capped, or worse, simply denied. Until then, everything here is legal at all levels, and these are all adults, and good information on handling and using is something I can provide to continue our excellent record of safety. Indeed, it was that proven record of safety in this country that won us our first round in court against the FDA. The shrill cries of danger to everyone was simply not backed up by evidence of any injuries or deaths.
So as long as nic is legal, I intend to do the best I can to guide those that wish to use it, because people will want to use it.