@Avi K. Sephardi have different minhagim and I am advised not to eat certain things from them.
In Israel I’m talking about people who ae Dati Leumi or Mizrachi, or people who look yeshivish, that you don’t know enough to know what is going on in their kitchen. For example if a Dati Leumi co-worker brings in something she made, I don’t know if she only uses Mehadrin, many people here use rabbanut. Should I sit with her and go through a list of the hescherim she eats?
Especially when it comes to Pesach many rabbanim pasken that rabbanut food is 100 percent chometz and cannot be used. It’s problematic.