If you can inform security then please do, as they may then be able to deal with the perpetrator and contact the authorities. However, we realise that security can be guilty of just shrugging and expecting you to persevere (and this is something which we are trying our very best to change). Inform your friends or whoever you trust as they may be able to protect you, and if it will keep you safe we suggest you leave the crowd or move away from the person harassing you. We are working with bands, venues and security companies to arrange a solid safety plan should you experience this. We will keep you informed on any developments.