question: USB power supply current

usaly when you connect much additional hardware to the BBB you´re supposed to use the 5V barrel connector for power supply instead of the USB cable, since this is limited to 500mA.
Is it safe to run the BBB with additional hardware just from USB power supply when I´m using a USB charging port, like a 1000mA mobile phone charger, as supply or will it be limited to 500mA inside the BBB aswell?

My personal experience has led me to believe, no you can not. About the only peripheral that I’ve noticed does not give issue when running off USB power is ethernet. But we’ve tried to run ethernet + CANBUS, and no go . . . and in this specific case, the board was being powered by a 1a wallwart to USB power supply.