That is very kind of to burn your own SB. You really don't have to do that. Life gets in the way sometimes!
The opening packs and burning the cards is an interesting idea.
I was going to ask the question in discord but actually I am not sure it is the best idea. What everyone really wants is for the SB price to go up. So the most immediate way to do that is to buy and burn the SB.
I am also working on building the game's treasury, as you know, and that should allow us to buy back SB in the future but we are still not in a position where we can do that consistently so anything that helps with that right now is very welcome.
EDIT: OK I'm being dumb, you still need to buy the SB to buy the packs! DOH!
So it is a reasonable idea. It would at least give you some content for the posts as you can show the cards you got. If you get a legendary it will show up in Discord too.