Why would you feel guilty?
I’ve read that kind of stuff about not burning seals, or drawing circles around them, in some of S. Connolly’s books, but she is religious, and treats the demons the same way a Christian treats Jesus. I find it quite silly.
In my opinion, the belief about not burning seals comes from the traditional grimoires, a system of magick in which you threaten to torture the spirits with fire in the name of God if they are unruly and do not obey you. It is the intent behind what you are doing that matters, not the simple action of burning a seal.
All you are doing when you burn a seal, is closing the connection. That’s it.
In EA’s books, he recommends burning the seal once the task is completed. I have done it that way for many years and no spirits have ever had an issue with it. If you read this forum, you will see some posts where the spirit itself suggests burning its seal as a way to finalise a spell. It certainly wouldn’t suggest that if it caused it harm.