Should school teachers have to wear uniforms?

Many people think that teacher drees codes are necessary. I however do not.The normal dress code for many schools is teachers aren't allowed to wear jeans and flip flops.
Tattoos and piercings aren't allowed to show either. 

In my opinion, the dress codes are like this because some of those things may come off as unprofessional.
Also I think that teachers have a certain dress code because that it is necessary for the amount of youth gangs in schools.
For this reason, a lot of schools have how to use uniforms.
In conclusion, I believe that every person should dress as you want, without going over the normal dress code.
With this, I mean that the people feel comfortable to wear clothes and not show anything.