Etiquette when working with multiple RE agents

[Alberto Camacho]

It was recommended to me that I cold call RE agents in my area. The idea being from all those calls I will find a some agents that will work well with me in finding properties. 

While that sounds great for me it goes against what I've been taught as RE agent etiquette. I'm thinking this might be a great way to develop a bad reputation with the local agents. 

So to all the agents on the forum, Should I be working with multiple agents and how does one achieve that harmony so no one feels like I'm wasting their time?