Are you allowed to work at a store (pet shop, for example) that does tzaar-baalei-chayyim to the animals it has there?
If you leave your store open on shabbos for your non-jewish or non-observant workers to run, and you don't make any money from it (give all profits to workers) is that ok?
More generally, doing personal things like phone calls, emails, etc. while on company time. How far does the "everybody does it" rationale go? I believe there is some category in halakha that accounts ...