So I'm growing Carolina Reapers and bell peppers in very close proximity to each other. On one of my bell pepper plants there is a strange looking pepper. It looks like a Reaper and its on one of my bell pepper plants, but it is growing very differently from how a normal bell does. I have attached images.
If you bought these plants this year, even though they're growing in close proximity, and even if the Reaper pollinates a bell pepper, it won't affect the plants or fruits - it only affects the seeds within, which will now be some sort of cross between the peppers if you grow from them next year.
If, though, you grew these yourself from seeds you saved, and you grew the two types of peppers last year, then all kinds of random crosses are possible. That bell pepper does look odd - be interesting to see what it tastes like.
Crossing happens only in seeds, so in future plants. So I don't think so.
Additionally I find that bell peppers have a lot of variance on fruits, also on the same plant. I still don't understand how commercial bell pepper are done. In markets they seems all similar. I think the pepper are much more sensible on environment (water, sun, temperature) then most of normal vegetables.