There are several synonyms for the phrase "are out of line," including inappropriate, improper, unacceptable, unreasonable, unsuitable, and erroneous. These terms all suggest behavior or actions that are not acceptable or in accordance with expected norms or standards. Inappropriate implies a lack of propriety or good taste, while improper suggests a violation of specific rules or regulations. Unacceptable implies something that is not tolerable or beyond the pale, while unreasonable denotes behavior that is not conducive to rational thought or discussion. Unsuitable suggests that something is not appropriate for a particular purpose, while erroneous implies a mistake or falsehood.