The accuraty of Editors

Is there a way to tag an Editor program on its level of accuracy ?
For instance, the old P1 & 2, were very hungry, glue wing or sticky for ways close by.
When using JOSM your able to zoom in and draw up to 0,01 m, useable or better when mapping buildings and structural objects the only way ?!
How to warn mappers not to use the different programs at the same time or do we take the risk to damage other mappers their work accidently ?