I don’t see anything wrong with that at all. There are many heroes of Tradition that deserve remembrance for their sacrifices and prayers for their deliverance from purgatory!
I’ve just seen too many times where sspx faithful have a large framed picture in their living room, along side some other holy picture. If you add to this fact that many sspx’ers will ONLY attend sspx masses (and not other masses from other traditional priests) and you have the recipe for cultish thinking. Some do, some don’t. All I’m saying.