Indeed. All the suggestions here are given by the people who really had never faced these scenarios. As a gal you go out and you face stalkers every day.
You see many of the perverts here even claim it is girls who are responsible for it. These are the type of ppl who are stalkers in real life.
The only way to avoid a stalker is face them bravely. Most of them are timid cowards who run away on the slightest sight of confrontation.