They're not going to do a thing. When was the last time you saw a RuneScape-based website get shut down by JaGeX for using some of their icons? I'll list some that use them that haven't been touched.
http://www.tip.it/runescape/?page=skill_calculators.htm
http://runehq.com/guidelist.php?type=skill
http://rsdo.net/RSDOnline/Calc/SkillsCalc.aspx
JaGeX doesn't care. The only people they have shut down have been people that abuse the game rules itself, and it really takes a lot for them to open a lawsuit against them. It's just simply not worth it for them. It's not an issue the management team would have to worry about. If they felt it was an issue, they'd first send a DMCA, then if we kept ignoring the issue, they might, MIGHT, open a lawsuit against us.
TLDR; not an issue, nothing will ever happen.