It is unfortunate that mostly WGT has no control over the content of their sponsors.
WGT buy ad 'bundles' that are embedded into the site. More often than not WGT are completely unaware of the content of these ads.
Although you are right, it should be monitored for the peace/ safety of the community.
Apart from the offers dropping bugs into your pc there is approx 40% of the ads on the WGT site (not game window) that are also bug droppers.
Ads telling you your PC is slow - click here to speed it up
Ads for upgrading your drivers
Ads telling you you are the 100th customer - click to pick up your prize
stay away from these 'tempt to treat' ads.
Its hard to know which are safe and which arent,
rule no 1.. Have a good Antivirus and anti Malware that updates itself every day
rule no 2.. Dont click on ads
rule no 3..Search the offer in google rather than clicking the ad
rule no 4..Dont accept offers that seem to good to be true.
rule no 5.. Dont use your primary email address for any of these, create an email in Yahoo / Hotmail whatever for this junk to go to.