Not so much Hobo Symbols but symbols that hobos survived just fine without.  

Instead of letting the dumb people weed themselves out we the people decided to nerf the world for them so they at least had a chance.

 

Caution Hot

In 1994 a woman spilled hot coffee on herself at McDonalds and was awarded $640,000 in a $2.86 million dollar judgment. Canada
Plastic Bags. If you have a baby, put the dangerous stuff up and pull your nose out of your smartphone and watch the kid.
Plastic Bags
What events had to occur for these warning labels on lawnmowers to be created?
Lawn Mower Warning

Ranges and stoves can tip over if you rest your foot on the open oven door while cooking?

Ranges and stoves can tip over if the oven door is used as a baby seat?

 

Range Warning

Even the bathroom is a dangerous place.

The fact that these had to be created in the first place and that they also need to be explained in English is just sad.

That would be like having hobo symbols with the english explanation wirtten under them.

Bathroom Dangers
And they still fall even with the signs displayed...
Wet Floor

This list is just too painful to continue but you can see some influence some of the hobo signs of the past might have had on the symbolism of today.

Alright... maybe not...

Warnings