A minimal amount of postings/responses for a person to be able to rate?

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This thought came to me as I was responding to a response to one of my discussions. It was about rating a discussion in order to rate the stars. Someone pointed out that spammers comes on here and rate people's discussions in a negative way to bring down people's ratings for fun. That's really sad that people come on here to ruin hopefuls with their pranks. I know, I thought I was creating some interresting and heartfelt discussions and responses. It was to my surprise that when I got my star, it was a lower rating than my old account was. So, if you need to have a certain number before gaining your star (100), some to be able to use those cute smiley faces (200) and copy cut and past (at 500, I believe) and I dont' know what else is available, do you think there should be a certain number for rating someone? After all, the ratings can make or break people's earning potentials. Good idea or another rule to live by? What are your opinions? *Pleiades