Escrowing doesn't make you untrustworthy, but buying and selling accounts does, in the eyes of some people.
The thing people like The Pharmacist want to get rid off is account sales, not trade escrows.
So where's the point in tagging escrows? You want to discourage account sellers and the buyers of those accounts, you do not want to discourage people from escrowing for trades.
And yes, many escrows will not offer their services for trades that do involve accounts, but that should be something up to the decision of the escrow themselves,
especially with a topic as controversial as account sales.

haha pharmacist, have fun with trollgaran.