I can see where you're coming from. However, I in particular don't believe that there is a need for it to by viewed by those other than 2 parties - the person submitting the report, and the staff members who are in charge of dealing it (GMs+).
Although you do raise a point by keeping an eye out for scammers, I don't agree with using the community watch as a method of exposing people, and giving them reputation as scammers. Some possibly innocent people could be accussed of scamming, and if the case is too amiguous to determine for certain whether they're guilty or not, many players reading the topic could be convinced that they are a scammer, even without sufficient proof to conclude such. This could ruin the reputation for some potentially innocent players. If they are indeed guilty, and sufficient evidence is provided to conclude such, they will likely be banned, and unable to even propose anymore trades that could result in another scam.
Although there is the time gap between their report, and the actual verdict from the staff on banning them (as well as some scam occurences going unreported) there is a possibility of them scamming another victim. However, rather than letting players view the evidence of them being scammers on community watch, I'd highly prefer a guideline on how to avoid being scammed. There was one on the old forums iirc, which instructed players to screenshot the trade agreements, save the IDs to their pokemon, screenshot the trade, be wary for suspicious offers, etc... On top of that, to prevent stat scams (the most common scams), the player engaging in the trade should ask the other player to make their playerdex profile publicly viewable, so they could check the pokemon's stats for themselves. If the person refuses to open their playerdex profile, I'd definitely be suspicious and not quick to trust them.
I understand that many may neglect to read that advice - we can only advise them as much as they allow us to advise them - However, if they disregard such basic guidelines. However, if they neglect to read guidelines on preventing scams, would they likely be inclinced to looking at all of the proven scammers on a publicly viewable community watch as well?
Just my 2 cents.