If you're going to use it "aggressively, always, relentlessly" then you may have to brace yourself for the occasions when you use it to someone from Brazil (where it's said to be a gesture along the lines of the middle finger) or with black-bloc counter-protestors near a nazi rally, or any other context where it's considered hateful or just generally rude. The Brazilian may just think you're an asshole. The black bloc guys will assume you are with the nazis who just hospitalised their friend...

This is what's important - it's not banned, it's not going to get you jailed. It's just going to land you in a tricky situation if you use it where it's going to be interpreted as a hate symbol.

What you do with this information is up to you.