We had a quite inveterate spammer or spambot here who signed up again and again and always posted links to an external web page in the model kit section. That's simply spamming and not trolling.
By the time Speedbird added his reply above it was already sorted out (thread removed, account banned)
@Speedbird 48 an all others: just use the report post button when you see spam, then the mods get an email and can react immediately. Replying to a post of a spambot and giving him bad rep doesn't help.