+1 for your care and concern.
No
It is likely to hurt both the swan and the humans interacting with the swan. From The role of animals in education:
Animals are increasingly being incorporated into the American school
setting to help teach students important behavioral and academic
lessons (Chung 1994; Dalton 1999; Mallon 1992; Pavia 1997). In a 1998
study, Beck and Rud surveyed 1,999 elementary school teachers
throughout the State of Indiana about the presence of animals in their
classrooms. The results indicated that 20 to 25 percent of the
teachers surveyed incorporate some type of animal in their classrooms.
Researchers have found that interacting with animals can help people
in numerous ways. Levinson (1962) was the first to formally theorize
that a dog could serve as a transitional object or "bridge" with which
an individual could form a nonthreatening relationship, which could
later expand to include other humans. Beck and Katcher (1983) found
that interacting with animals almost always has positive influences on
children. Mallon (1992) suggested that animals play a role in
socializing and humanizing children. Many researchers and writers have
noted the value of utilizing animals as mediators to help people who
are not being reached by other methods (Corson, Corson, and Gwynne
1975; Johnson 1983; McCullough 1982).
Some reasons that interventions involving animals produce results when
other methods fail include issues of trust, nurturance, social
perception bias, physiological response, resistance to treatment,
nonverbal communication, identity, control, and touch.
Trust. Many researchers, including Levinson (1965) and Ruth (1992),
have observed that children who are not comfortable interacting with
other humans often do not feel the same inhibition with animals. As
Levinson (1969) stated, when interacting with an animal, a child can
assume the role of teacher, parent, or anything else without fear of
rejection. Gonski (1985) postulated that animals provide a safe means
for children to begin to trust nonjudgmental beings, before trusting
humans. Whatever the reason, some children find interactions with
animals less stressful than those with humans (Brickel 1982: Levinson
1965; Robin et al. 1984; Ruth 1992). Many claim the reason is that
animals provide unconditional acceptance and love, without the
criticism that so often accompanies human interactions (Beck and
Katcher 1983; Levinson 1969; Siegel 1962).
Further reading:
- Treating Human Trauma with the Help of Animals: Trauma Informed Intervention for Child Maltreatment and Adult Post-Traumatic Stress
- Research in the use of animals as a treatment for humans
There is also the ethical question of betraying an animal that trusts you.