I don't know if this has been mentioned or touched before... These are my personal ideas and opinions, please avoid negative comments.
Items have same name= If some of you haven't noticed, some items have the same exact name... An example would be Skateboard Trash Pick ( aka= monkey one and original one in trades) Also the Halloween candies, they all have the same name (Candy) All I'm asking is to add something to the name, an example would be= Summer Skateboard Trash Pick to the "monkey one" This will help prevent scams, since many people are getting scammed by that.
Explosives Hiding items= Some people have been using explosive guns/weapons to hide items in table and scam people making them think it's another item. All I'm asking is to disable explosive guns/weapons inside the Trading Tables.
Password to trade (This idea might not be as good, but I will say it anyways)= Have you ever been hacked? Getting your supers stolen by your "friend"? My idea is that you require a password before trading your supers, if you forget your password, you can get it emailed to your email. (This can also apply when buying ec items, reseting spar stats and buying anything with gralats)
Search button in tables= I think everyone wants this, it is really annoying when you are trading and you have a lot of items and it is hard trying to find one by scrolling down... My suggestion is to add a search button.
Oh well, those are some of my ideas... Hope they help!