Yes, if a married person comes on to me, I refused to see him/her unless they are in an open relationship and their spouse knows about me. Even better if I get to communicate with the spouse a bit first, perhaps a PM or 2.
Love withers under constraint; its very essence is liberty. It is compatible neither with envy, jealousy or fear. It is there most pure, perfect and unlimited when its votaries live in confidence, equality and unreserve. -- Shelley
Mags, F, 60, poly-dating, loving and living with
miss pixi, F, 38
Punk, 41, M (dating since Oct 2015)
and a few more casual relationships