False positives will likely frustrate users and pornographic content will all but certainly slip through the government's net.

To avoid domain squatting that could frustrate potential users, the Polish Wikipedia also has its own domain, wikipedia.pl, which redirects to pl.wikipedia.org.

Moreover, business models may develop, or technology may be deployed in the network, that frustrates users and dramatically departs from the Internet's open-architecture roots.

Visual, 'point-and-shoot'-style interfaces tend to have easy initial learning curves, but also to lack depth; they often frustrate advanced users who would be better served by a command-style interface.

What the DRM does do is frustrate legitimate users and stifle the fledgeling market for digital distribution.

This can easily frustrate users.

Complex systems that are hard to learn can frustrate early users, but are ultimately accepted.

However, such standardized answers may frustrate users.

The phone's battery must be charged for 10 hours before use, which might frustrate users who require instant gratification.

This has frustrated users and programmers.