Be cautious with something that can make some extra bucks for the people...
If the second reporter badge will be required for something (joining to campaign, etc.. where they talk about money in the end), people who really want to join, will do everything (legal or illegal) to achieve that 2nd badge...
The easiest way for our much-loved spammers is to create some fake accounts, create around 500 (or 1000, depends on the final decision of the limit) spam posts and report them on the spot... This will give them the second badge and will give the forum another 500 (or 1000) spam posts in various topics.... (and another 500 or 1000 post to check for the mods, who could check other 500 or 1000 real spam post instead...)
I kinda agree to not to make the reporter badge tier 2 as a requirement to join a signature campaign. I believe merit will be more suitable for it and some managers already applied it nowadays.
the idea is continuity, after you reach some awareness
Personally I don't like the idea of compulsion to report anything. Such things confer an additonal value on the report badges (which they initially didn't comprise) and provokes excessive nervousness. Many people here are already too serious and wary.
Serious into a good things and bring positiveness is good. I always consider that as a good thing. Meanwhile, lack of seriousness can cause a a lot of mess. See our forum now. Lot of spam (by spam, i mean a really really low quality posts)