Regarding the megaphone I think that gold should be the one to start from. The second one can be green (of different shade perhaps) and the final one should be red.
I d`nt agree that the final one should be red.
How can a red report be "good" ? 
The xtraelv was right, red and really not suitable.
4. If you use a symbol, it will be in a limitation, there will be no Count of how many reports it has made, in which case a person can stop by a limited report, so I do not think there will be any benefit from this process....
I d`nt agree, it will be useful. Our community, as it turned out, loves all sorts of achievements, so I think that there will always be new "reporters".