There is no problem with crossposting, in my opinion.

There is nothing wrong with a crosspost PROPERLY LABELED.

Crossposted that is not labeled is rude and in violation of internet etiquette. It is not fair to newbies not to tell them so.

If I was walking around with a piece of toilet tissue stuck to my pants, I would appreciate being told as quickly as possible. Wouldn't you?

My comment stands. Crossposts should be avoided when possible and properly labeled when unavoidable.