I sort of see the other guys view on this. I hunt private property only and there are spots I have hunted for 40 years. I know when the birds are likely to fly and I get there just in time to place my decoys.
If a new guy started hunting my spots I would not like it. I see the point of inviting them to use "their" blind, but really since these guys have been hunting there I assume for quite some time you should leave. After all, they did build the blind... good or not.
This probably not what you wanted to hear, but think about it.... if you had spent time hunting there and new guy moves in and doesn't build his own blind but uses yours and you show up to hunt?....