TNA advertising in Stamford, Connecticut will be about as effective as Pepsi advertising in Atlanta, Georgia, the global headquarters of Coca-Cola.
Look, considering the WWE employs a good chunk of the people that live in Stamford, has been a valuable member of the Stamford business community for decades, and overall has a fairly large presence there, what does TNA really think they are going to accomplish? Pretty certain that any "tourists" there to visit the WWE headquarters are already diehard WWE fans, or else they wouldn't have bothered to make the trip. Ambivalent wrestling fans aren't going to spend the money to get to Stamford to take a tour. Basically, Stamford, Connecticut is probably one of the most pro-WWE towns in the nation, and nothing TNA does is going to change that. It is very much a losing battle.
However...with that being said, I appreciate the moxie. I think there is no chance in hell it will actually be effective, but I do like the fact that TNA had the balls to actually do it, and I can't really criticize them for going straight to the heart of the enemy and saying, fuck you! I am a lifelong WWE fan, I hate TNA, but putting up billboards in Stamford is amusing.
About 7 years ago, I went to the Six Flags amusement park in Denver, Colorado, Elitch Gardens. I am a diehard Detroit Red Wings fan, and this was towards the tail end of the absolutely bitter Wings/Avalanche rivalry. Now, as a Red Wings fan, knowing ahead of time I was going straight into the heart of enemy territory, what do you suppose I did? Yep. You got it. I wore as much Red Wings stuff I as owned, JUST to be defiant, BECAUSE I knew I was in Avs Central. That is kind of what I think TNA is doing. They know that those billboards really won't sway anyone, but they are just saying fuck you, just because. I really can't fault them for that.