Well here is RuneScape 101 for those pesky ads:
on either side of the add there is a small image that says "advert" as well as a question mark. Click that question mark and copy down the advert ID. next follow the directions in that same window with the ID and report all the moving, and downright annoying ads that slow down your computer. This will get JaGeX to review these ads and remove them from appearing again, making RuneScape a safe place once again!
Now this isn't the only thing that gets annoying when playing the "Free To Play," or F2P version of RuneScape. In an F2P server you can only do so much, the P2P (Pay to Play) version has something like eight more skills, several different minigames, and over a hundred more quests, not to mention the areas you can explore in P2P dwarfs the F2P map. Now for $5.95 a month to get all those options seems like a steal, but being the casual gamers we are, is $6 a month really worth it when you only play an hour a day, if that? And not only that, its only $6 if you live in certain countries, and pay with a credit card. now there are several ways to pay instead of using a credit card, but some reach up to $10 a month.
But Overall for a game with thousands of hours of gameplay, and many things to do even if you are a F2P noob, you gotta say, this is a great game for the casual gamer.