Minecraft Username: EpicAssassin158
Your Minecraft username here.

Brief Description: When you put ice by a locked sign on ice it melts it
Provide a brief description of the bug/exploit with a sentence or two.

Instructions:
1. Lock a sign (Preferably someone elses lock)
2. put glowstone by it
3. Then it melts and the sign goes
..
List the steps needed to take to reproduce this bug. Add more or less instructions appropriate to getting to the bug. If it's just a single step or ten steps, just add the numbers accordingly. Numeral listing is preferred.

How many times did you recreate this bug?: Once
Example: 1 out of 3 times, etc. This is necessary so that we may analyze if this is a bug that is probability-based. It also ensures that it's not just you who may have made the mistake in the first place and solidifies your bug report.

Result: The sign being destroyed
What actually happened upon doing the bug. This goes roughly hand-in-hand with the brief description, but this is just the result - nothing else.

Expected Result: It staying there
If there was an expected result, then please post what was supposed to happen, as opposed to what didn't.

Evidence:
Any screenshots/videos that can be used to show us as to what happens. Optional, but recommended.

 

I figured it out by doing some tidying up by pvp