Too Many Inexperienced Players Rush Righteous Glory, Thornmail and Maw

Can't Riot make a PSA explaining that in must match-ups rushing these items is terrible?

I just lost a game because I camped my Maokai --Who was vs a Tryndamere. I completely demolished him -- 3 successful ganks as Rammus before the 8 minute mark. All the sudden I start seeing the enemy Trynda proxy farming and taking my entire jungle. I look at the items and saw that Maokai had Rushed RIghteours Glory (He said he wanted to Gank bot with it...) and proceded to buy the entire Thornmail. Needless to say, Trynda just ignored him and killed him with the enemy Yi multiple times under tower because Maokai had jack shit health for his super expensive item that does nothing at that stage in the game.

Riot REALLY needs to help noobs know proper itemization paths. If maokai had Rushes Bami's Cinder into Bramble Vest and go from there we would had won the game. Instead all my hard work went to shit