Ok, exactly what law is violated by pointing a laser pointer at another person in those many places you are aware of? Beyond that, the allegation was that the "suspected offender" pointed a laser pointer "at the stage," not at another person.
Procedures for removing a person from a crowded venue generally would not begin with tackling them. The risk to others as well as the potential for riot or panic caused by that level of escalation indicates to me that the guy doing the tackling had no training and no brains. But if you want, go ahead and explain the proper way to handle a potentially laser pointer possessing "suspected offender."
a laser in the eye can potentially harm the eye. don't
be so naive.
in a dark,crowded,noisy venue one does not waste time
banding about making polite conversation. its to dark to
detect whats going on around you and or how others in
the crowd will react. i am sure his ten companions were
completely sober and passive and friendly but,you don't
risk confrontations in such a scenario. you grab the culprit
and remove him from the area. this has been standard technique
at clubs and arena's for years. you have safety and liability issues
to consider.one of those issues is not starting a melee in a crowded,
dark and ,loud venue where other patrons may be harmed.
the victim in the story says he was tackled. the OP
says he was drug away. 6 of one,half a dozen of the other.
you remove the threat,perceived or real as quickly as
possible.you ask questions later.
of course there will be mitigating circumstances in any
situation but, lets face it.this wasn't an ice cream social.

regards
mike