If mass demonstrations are not going to be used to cause actual disruption to the system (and disruption to the system does not mean disruption to the daily lives of the people, but rather to the mechanisms through which power pursues its objectives), then they should at least be used to raise relevant and meaningful issues.
This can still be a valuable action if it is done concomitant with more forceful tactics, as a means both of explaining those tactics and pointing out to power the way to resolve the crisis. In other words, the fewer people you have who are prepared to genuinely confront the system, the more intense and targeted their actions will have to be, and the more calculated to achieve maximum disruptive effect; these actions will cause a crisis for the power structure (I did not say “the government”), and the demands raised through public demonstrations will explain the way to end the disruption.
These issues and demands, again, should be specific, socioeconomic, and common to all Egyptians, not general, not political, and not related to a particular party or group.