It happened to me a couple times at shopping events. I thought I was being smart by blocking him, then when it happened again I realized he had like 1000 alts.
"Hey Madi, nice avatar, I am new to SL, I currently saved up 14 L$ from camping so far. I need 100 L$ to play this pawesome kitty avatar gacha, I have been wondering if you could lend 86 L$ to me? If not that's OK too, it just seems like no one likes to help cat people in SL"