Someone is trying to buy BTC from me and pay me with carded WU transfers, will this put me in trouble as a receiver?
Not a good idea you will be arrested if they found some frauds like western union if its carding its illegal many people already arrested because of carding online.. many carder or people who are doing carding are arrested. you are not safe to use those carding without use anonymous ip or proxy.. since its a western union to receive it you need your personal location so you will be still not safe..