Quite....that would be a no-no.
By the same token, a Roman Catholic would not be eligible to take communion in a protestant church. You need to be confirmed in the faith to do that.
Untrue. Many protestant churches practice "open communion", meaning anyone can partake.
Untrue. Many protestant churches practice "open communion", meaning anyone can partake.
No, many of the mainline protestant denominations have what is called “open table” so that any who wish can share in the Lord’s Supper. However, as posted before, these denominations do not believe it is the true body and blood, which is actually the reason for the Catholic restriction.
It is frowned on for RCs to take communion elsewhere, but I don’t think it’s a terribly serious sin. If I’m to go to hell, the Lord will be able to find many better reasons to send me there than that.