I think the problem here is the OP guy got a bit scared because the ad showed him his ip address
but obviously, the ad server would have his ip address in order to send him the ad in the first place LOL
it is the fact it has been "shown" to him, that has caused the fears,
he is concerned about the regular functioning of the internet nothing sinister
people are taught that if somone has your ip address this is a breach of security, while this can be true in some situations , that is not valid here
i have not seen any ad's on this site, .. but then again i am not a typical user, i do take some interest in security, but i am no expert lol
i do not allow javascript , cookies , vbscript , activex iframes unless it is needed for some logins etc
and i do have adblock , im using comodo dragon, which is based on chrome with a few security tweaks
i do not use a proxy or vps or anything to mask my ip address , imo it is unnecessary to hide it here although it is a simple step to do so
if it gives piece of mind to others to uses proxies i am all for that
there is nothing riu can do to protect any of it's users, from direct compromise, this is not there job anyway
RIU should fully disclose yes, im sure it does try to keep it up to date, all sites do this ad's crap ... ad's and spam are pretty much useless, and plague the internet , but they also provide revenue for those giving "free sites" like RIU
any sub-domain or ad server or new domain that folk connect to subsequently after connection to this site SHOULD be disclosed, you are perfectly right about that ..
but since it is not a requirement to use this site .. it is not like ad-ware in a piece of software, where you need to accept the ad's to run the free software
you are free to block all connections yourself to any other domains on any website you visit, but this would be so tedious and would disrupt your browsing experience since you would be blocking things constantly on virtually every site , ad block and other programs like that work quite well to automatically get most of the known ad's and ad servers but will not block them all, since they are mostly dependent on "black lists" and "white lists" anything new will slip past them
This site gets a fair amount of traffic, which amounts to a fair amount of revenue from ad's it is kind of sad that all sites have to get involved with this kind of shite, but that is just the way it is, they are all doing it.. it's not sinister, although it is not in anyway helpful either, it is just spam/ junk mail type of thing .. an annoyance not a security risk imo
peace