Personally speaking, yes, I would feel quite guilty about doing something like that, especially with a domestic turkey. I don't know what your situation is, however, I'm fortunate in that I have the options of reporting to AC and/or trapping and taking strays to our local shelter.
My thinking is, if one has a neighbor who, after you've discussed the problem with them time and time again and they don't hear you, the chances are good that they're going to continue to have selective hearing so, my choices are, a) I can take matters into my own hands (and by that I'll refer back to my first paragraph above) or b) in order to keep some semblance of peace and sanity of mind, I can do everything within my power to keep the offending animals off my property. I learned a long time ago that I cannot depend on others to do what is right and, if the efforts I put forth end up not working, then I'll go with a).
Now, some will say "But, it's not 'your' responsibility to keep someone else's animals off your property." They would be correct, however, the word "responsible" doesn't seem to be a part of some folk's vocabulary and I sure can't blame the offending animal for their owner's shortcomings and, in the end, before I do go the step further, I can at least say I did everything I was able to protect what's mine.