Actual threats? Not just complaints, but threatening messages? Wow...lots of nut cases out there. PETA is against aquariums as a whole...after all, the fish have rights, so we can't "own" them ...so are you a favoured target just because of how many fish you keep?
I somehow got onto PETA's mailing list, and receive updates of their drivel on a regular basis. My friends ask me why I don't get myself unsubscribed...but I think it's worthwhile to maintain some sort of contact just so I have an idea where they are heading; and it costs money to mail and email that junk to me..so let them waste their money!
It could be just kids having perverted kind of fun but yes, YouTube comments that directly threaten us, our business, etc. without explanations. I am considering getting a handgun and concealed carry permit just in case these are not empty words.