This is just too strange and unexpected to pass by..

Rav Bentzion Hakohen Kook, a rav in the Romema neighborhood of Jerusalem and close student of Rav Elyashiv, has written a psak, that he says was shown to Rav Elyashiv, by which it would be prohibited to enter the Beit Hamikdash with long peyos.

Rav Kook explains that it is prohibited to enter the Temple with wild hair due to the laws of "mora mikdash", and serving with wild hair, and long peyos, is even worse resulting in a punishment of the Heavenly death penalty.

Rav Kook adds that he had discussed his psak with Rav Elyashiv, and Rav Elyashiv agreed with it while expressing his consternation at the idea. Rav Elyashiv had supposedly said that it is an amazing idea - the Kohanim were serving, the people were coming to bring their offerings and pay visits to the Mikdash, and all of the people would come on the holidays for aliyah l'regel, and it is a novelty to say that in the time of the Beis Hamikdash they could not grow their peyos long. Rav Elyashiv found a solution to the disturbing idea by saying that they could grow their peyos for a period of 30 days, so short peyos would be acceptable.

I am proud to say that I am machmir like this psak supposedly accepted by Rav Elyashiv and am preparing for the building of the Beis Hamikdash by keeping my peyos short and ready...

Another point Rav Kook makes is that the average Jew paying a visit to the Mikdash, say aliyah l'regel for example, would have been allowed to grow out a nice coiffed head of hair, with a blorit, or tchup in yeshivish, (forelock in English, I think), as a viisitors issue is adhering to concepts of mora mikdash, and a blorit is not "parua rosh". However, a kohen serving in the mikdash would not have been allowed to have a blorit.
(source: Walla)

True or not  I don't know, but definitely interesting...

And, as with all piskei halacha publicized via the Internet (or anywhere else for that matter), discuss it with your rav or research the issues yourself before relying on the psak.