A little Kindess...Does it really Kill?

I have been very busy lately but have missed writing about my virtual world experiences, so I am back. I must say I am still enjoying myself in Secondlife, Inworldz, and now OSG. They all have their perks. I like Secondlife because its where I started, I like Inworldz because its where I got my new start, and I like OSG because I can control my regions. Though most of my experiences have been great, I must say I was taken back but some people recently who were rather upset about how I rewarded a friend for helping me with something.

I have had a scripting issue in Inworldz since Phlox was rolled out. I am a cut and paste scripter so I had no idea what my issue was. I had tried to ask people for a long time if they could fix it to no a vale. I finally find someone in SL who is willing to come to Inworldz to fix it for me. He was also my RL husband's friend.He does so in less than an hour. I was thrilled. I asked him how much did I owe him. He asked me if instead of paying me, perhaps we could do a trade and he could have a store on my land. I thought it sounded fair to me, especially for as long as this broken script had plagued me. He is a fan of my husband's and had supported his music since he started. I told him to choose a spot that was empty and he could have it. I had done trades with people before and just took the box which didn't seem to bother anyone.

However, this time was different. The day he started setting up I had a  house renter iming me asking me what was going on. I explained that he was my husband's rl friend who had helped fix a scripting issues I had so I was letting him have a small store. I am not quite sure why she was concerned with the stores since she was renting a home, but she was very bothered about it. She imed me, and my husband several times calling him a squatter and saying it wasn't right.By the end of the week, she took her things and left. I was a bit surprised.

So, my question is, was me letting him take a store instead of money from me wrong? I thought it was a mutual exchange that would not be bothering anyone. I will never understand people I guess, no matter how much I try.