Unstable netherportals

I believe an interesting feature would be that the more crying obsidian that's in a nether portal the more Unstable it would become. you could maybe get away with a small amount of crying obsidian but as you at more and more crying obsidian the portal would become increasingly unstable to the point that if you enter, you will likely not spawn at the correct portal and the portal you come throw would likely explode. you would also be warned as these Unstable portals would give of alarming sounds and might take multiple tries with a flint and steel to light.

Unstable nether portals are just in idea but think at minimum something should happen if you make a nether portal that has crying obsidian in it.