Recently a company contacted me for recruiting purposes. However, I have previously worked at this company and been fired under very questionable circumstances, and yet they are trying to recruit me despite having previously fired me. Sounds weird, I know, it is. They have contacted me many times since I was terminated, and up until recently I've basically just told them to go to hell (the circumstances under which I was fired can be generously called "unfair"). However, they are beginning to become more aggressive with their recruiting, and while previously I might get 1 message in 6 months, now I am getting 1 or 2 per week, and its seriously getting annoying.
Now, I truly hate this company and would like nothing better than for them to die in a fire (figuratively of course, I wish no harm to the individual employees, only to the company as a whole, and maybe some general physical discomfort to my former line manager). Since they won't stop harassing me no matter how many times I tell them to screw off, I was thinking of accepting their interview. Since the company is in a different locale from my own, they would have to fly me out to any onsite stage I was to attend. I was thinking of taking this opportunity as a personal trip to go to the company's locale, go sightseeing, visit friends, and overall have a great time on the company's dime, with no intention of actually attending the interview (or perhaps attending the first in a day long interview loop and then leaving immediately).
While I know this is morally questionable (to put it lightly), due to my history with this company I have no qualms about doing morally questionable things to them, as they have done such and more to me in the past while I was employed there. What I am wondering is, what might I be liable for in terms of e.g. them trying to collect recompense from me for the price of the plane ticket/hotel/etc if I was to try to pull this scheme?